Loom dobby



Dec 2o, 1927.

A. A. GORDON LOOM DOBBY Filed Sept. l5. 19,26

5 Sheets-Sheet l 54 3532 so 51 www?? l. a l i i rz g 29 l 73 4x g i E a so 6l 40 Q 4Z g J 6:

au D s H VJ 4, n 57 w T5?. 54 55 sa 4?' I [fire/:for

Dec. 20, 1927. 1,653,207

A. A. GORDON LOOM DOBBY Filed sept. 15. 1926 5 sheets-Sheet? Patented Dec. 20, 1927.

UNITED STATE-S.

PATENT QFFICE'Q,

ALBERT A. Gonnonor Wonons'rnn, `Missacansnr'rs, Assienon To anonymen sa nnownns LOOM WORKS, or wononsrnn MASSACHUSETTS, A coniaoaa'rron kor MASSACHUSETTS.

LMOM maar. s

Application le d Se p teInber 15, 192?. Serial'Nof 135,681..

lIhis invention relates to iinprovenientsin frein one cylinder to the other. In niy prior Patent No. 935,652 issued Oct.

n 19092 there' is showna dobby having two separate cylinders and pattern ehainswhich cooperate with a rocking traine having two sets of levers, the levers being` arranged in pairs, one ineniber of each pair being in each set and each pairbeing operatively p sitioned with respect to a dobhyiinger. A main control or box chain is inade use of to rock the frame carrying the two sets of le vers so thatvbut oneset will be operatively related tov a pattern chain at a time. In this way it is possible to produce a fabric having two distinctJ weavesj one represented by` one of the pattern chains and the other represented by the other chain,` the shifting of the weave being accomplished by the con# trol or box chain.`

The chains in said patent and in all earlier dobby patents showing ldouble cylinders, so 'liar as I can ascertain, are oi the s'o-called single index type; that is, the bars ofchain are provided with a single row of pegs and it is necessary to inovethe chain once every pick Ot the leoni, one chain bar controlling the upper set of hooks and the next chain bar controlling the lower set oi hooks. Where the length of the repeat of they pattern is considerable a` dobby inade according to my prior patent' will employ chains of considerable length and it is an important object of niy present invention to substitute double index chains or those previously used so that the length et the chains may be halved.

` It will be understood that each bar, of the so-called double indexpattern chainis provided with two setsoit indicating pegs one of which controls the upper hools and they other ot which controls the lower h0ols,so that one bar of the double index chain will suilice for two picks. When shifting, therefore, troni one double index chainto another it is necessary to have the shittii'ig come at theproper tiine to be sure that the weave continues on the proper' set of'pegs. In the aikifsiiid patent this condition does not arise because the chain inust` receive a movement every'pick of thelooin'fand when ,l i, ..y ,i .the control is passed troni one Chain to the other by the control chaisaitl other chain will start to `1nov e'l immediately and the hooks will be' properly placedto' form the-l next shed. It is an important and fuither' object o' niy invention to prov'ideffor'driv- .ing thel control or box chain "invthe saine tinie ast-lie cylinders are dr`iven,`th at 'isi'the box or control chain advances'every'secondv piek as does the active cylinder. In this way I `avoid the possibility of starting a' new weave on the wrong set' of pegs, aconditi'o'n which niightexist it the ysaine ratio of driv`` ingwere toexist asis shown in inyaforesai'd patent. A well-known feature of double index dobbies is that itispo'sfsibletoweave plain,' that is, one up and one down, while the pat: tern .chain is at rest because of the fact that the double index chain controls two succes-`r sive picks of the leona andonly t'wo picks are necessary for completing"thecycle in plain weaving, It is therefore a furthery object of iny invention to provide afdouble in'- dex vdouble cylinder .dobby wherein either chain Vmay be arrested to produce plain weaving. lith thisconstruction it is pos'- sible to weave an intricatepattern havinfg a stripe of plain weave alternating ywith satin and controlled from one cylider and another portionof the repeat having" a` two-up and two-down twill alternating with. asoinewhat wider stripe of plain weave whichjis'not a multiple of the width of the plain'` stripe laid bythe iirst chain. In this wayitV is possible to use two stripes ol plain weave which are not relatedin nuniber of pielsand itis further possible when desiring toprovide a stripe of plain weave ofstlilla 4different plain weaving is done to the hars oit the other chain which are for' plain weave.

With 'these and other objects in view which will appear as' the description proceeds, Inyinventionresides in the combina'- tion and arrangementj'ot, parts hereinafter described and set forth in the claiins. f

In the accompanying drawingswherein I have shown a'convenient'embodiment of my f invention,` f A Fig. 1 is a side elevation of parts of a dob- Iiy embodying my improvements, parts being shown in section,

Fig. 2 is a horizontal sectional plan view, taken along line 2 2 ot Fig. 1,

Fig. -3 is a. vertical section taken on line 3 ot' Fig. 1, showing the outei cylinder active,

Fig. 4 is a view similar to a portion of Fig. 3 showing certain of the partsina ditferent position, with the inner cylinder active,

Fig. 5 is a diagrammatic side elevation of certain operating mechanism tor the dobby,

Fig. 6 is a det-ail plan view looking in the direction of arrow 6, Fig. 1 and showing that part of the mechanism which lies Uabove the structure shown in Fig. 2, certain parts being in section, Y

Fig. is a vertical section on line T-Y of Fig. 1, part olf the chain sprocket being removed for clearness,

Fig. 8 is a vertical section on line 8--8 ot Fig. 7 showing` the control oi the drive for the weave chains trom the boi; chain, parts on the vertical shaft being in section for clearncss, and

Fig. 9 is a detail vertical section on line 9-9 of Fig. 6, showing the relationL of the control chain and the multiplier chain.

Referring to the drawings, my improved dobby is assembled on a trame 10 and is pro vided with the usual harness jacks 11 to which are pivoted levers 12 having upper and lower dobby hooks 13 and 14, respectively. The upper hooks 13 are lifted by rods 15 which rest cn alternate dcbby fingers 16 while the lower hooks 14 aie lifted by up` wardly curved ends 17 otthe intermediate iingers 18. Upper and lower knife bars 20 and 21 for actuating the dobby hooks 13 and 14, respectively, are rcciprocated alternately by rocking levers 22 (Figs. land 5) which are connected to cach end of each knife bar 2O and 21 by adjustable links 23.

The mechanism comprising my present invention includes a pair of double index dobby cylinders and their weave chains; a` control chain which regulates the boxes, determines which cylinder shall be active when either is called and also determines when both cylinders shall be inactive for plain weaving', and calls the multiplier into action; and the. multiplier mechanism which acts as usual to start and stop the control chain to lessen the number ot bars on said control chain. These parts ot thel device will be described and then their operation explained.

all@

there being a pair of levers for each tinge-r. Two pattern cylinders 31 and 32 are mounted below the cylinder levers and 26, respectively, and are each provided with a chain made up oi pattern bars 33 each having a double row of pegs 34 and 35 mounted thereon. The pegs are so positioned that each peg 34 will engage a lever 25 or 26 which is associated with one ot' the fingers 16 for the upper hooks 13, while each pin 55 will engage a lever 25 oi' 26 associated with a finger 18 operative to position one of the lower hooks 14. Adjustable stop screws 3T and 38 (Figs. 3 and 4) are provided tor limiting the rocking movement of the supporting frame 29.

The purpose of having the two cylinders 31 and 32 is to be able to produce two distinct weaves in the i'abric, one chain being pegged to give a weave diii'erent trom that produced by the other chain. It is desirable to have but one cylinder in action at a time, namely, the one in operative relation with the cylinder levers, and it is further desirable to render the cylinders alternately cli'ective to control the dobby lingers.

The mechanism i'or accomplishing this result is shown in Figs. 1 and 2 and includes an intermittent worm 40 which for the present will be assumed as rotating with an upright shaft 41. Said worm 40 engages a worm gear 42 loosely rotatable on the cylinder sha-it 43 to which is secured the cylinder 32 (Figs. 2 and 7). A spur gear 44 fast on the hub 42a of the worm gear 42 engages a similar spur gear 45 loose on the shait- 46 to which is secured cylinder 31. A driving disc 4T is keyed to the shaft 43 adjacent gear 44 and a similar disc 48 is keyed to the sha'tt 46 adjacent gear 45.

A grooved clutch collar 49 is slidable on the hub 42a of gear 42 and has a tongue 50 extending into an opening 51 in gear 44 and also adapted to extend into one ot several openings 52 in the disc 47 when the collar 49 is moved outward on the hub of the gear 42. A similar grooved clutch collar 53 is slidable on the hub ot' gear 45 for cylinder 3l and has a tongue 54 extending through an opening' 55 in the gear 45 and adapted to extend into one ot' several openings 56 in the disc 48. There are preferably as many disc openings 52 or 56 as there are operative angular positions ot the cylinder, there being sii: shown in the drawings.

The collars 49 and 53 are controlled by a three-armed yoke lever having an arm 57 engaging the collar 49, an arm 58 engaging the collar`53 and a lorked arm 59 engaging a stud 60 on hub 61 ot an actuating lever 62 (Fig. The lever 62 1) is connected by an adjustable link 63 to a lever 64 pivoted to a fixed stud 65 and' having an arm 66 engaged by a portion ot the control chain 67 to be described hereinafter. A

lll() uessgaor.

torsion spring 72 (Fig. 2) actsto movethe rocking frame 29v ma counter-clockwise d1- rection as viewed in' Fig. 1, opposing the action of the controlfchain When aball on the latterl moves under thearm 66; Bear# ings 7 3 support those ends ofshafts 43 and 46 adjacent thev shaft 41, the opposite ends,`

of said shaftsbeing supported in any approved manner. f

By the mechanism thus/fardescribed the.

rocking frame 29 can be movedffrom the position shown in Fig. 3 to that shown 1n Fig. 4, thereby passinglcontrol of the dobby fingers from cylinder 31 to cylinder 32', and

simultaneously rendering cylinder 81l inactive. and cylinder32 active. In thisvvayf the pattern shifts fromy one Weavey to the other. Except for'thearrangement ofthe pegs 34 and 35 thecylin'ders 31 and 3 2andi parts associated ,therewithV are substantially the same astheicorresponding parts of my aforesaid patent.'

I willl nowk describe the control pattern; which determines among other thingsfvvheny be given an. operative movement every second pick of the loom in order to prevent the cylinders from assuming control on. the wrong pick, as already Vsetforth. The vmechanism for insuring the proper drive. of the control chain is indicated diagrammatically in Fig. 5, Where 1a pinion 7 5 secured tothe top or crank shaft 76 of the loom` meshes with a gear 77 having twice as many teeth as the pinion 75. A crank pin 78 on the gear 7 7 is connected by a link 79 to anarin'80 of the rocking lever 22, said lever 22 being thus rocked in one direction on one pick of the loom and in the opposite direction on on the next pick. l n

The gear 77 is mounted. on a shaft 81 which is connected to the Worm shaft 41 by mitrey gears 82` and 83. An intermittent Worm 85 secured tothe upper endg of upright shaft 41 (Figs.` 1, 5, and 6) meshes With a Worm gear 8,6 'rotatable freely on Xed stud 87 and held in proper position on said stud by collar 84. With these connections, it is not possible for the rocking levers p22 or the control chain 67 to get out of step with the cylinders 31 or 32, or to change the relative positions thereof at the Wrong pick. It Willbe seen that the dwell portions of intermittent Worms 40 and 85, are on the same sidevof the shaft 41 and that the gears 42 and 86 are onopposite sides of said shaft 41 so that but one of they gears42 or 86 and the mechanism associated therewith` is being actuated at a time.

The Worm gear `86fhas flugs 88 fadapted for engagement with teeth189 of a collar 90 slid!L able onand keyed to the sleeve 91 of cylinder 92 for the control chain 67'y (see Fig.v 6). An arm 93 controlled by the` multiplier mechanism to kbe describedmoves the collar toward and` fromthe Worm gear 86 to turn the cylinder 92" and control chain G7 or render the same inactive. y

yThe control' chainisseveral spaces wide to cooperate with a plurality of controlf levers, one of said levers 94 being loosely mounted on av short' shaft 95 rotatable 1n a firedI bearing96 formedaspart yof the dobbyy frame. Saidlever 94 is attached by a connector 97 to a lever98 (see Fig. 8) 'a portion of Whichientersthe groove of a collar 99 keyed to andislidable vertically on shaft 41.

Said collar 99 has pockets 100 which receivel the lugs 101 of the Worm 40 assumed in the i previous description to rotate With shaft 41. A compression spring 102between Worm 85 androllar 99 tends to move the latter toward Worin* 40 and the latter isv supported by collar 104 fast on shaft 41. It is thus pos#v g sible for the control chain to disconnect thek cylinders *31* and 82 f-rom their driving mechanism. 'f' i f Another lever 105' is secured to the shaft and' registers with one of the spaces of the control chain 67. l14n arm 106 i 7") fast onv shaft 95 entersv the groove`V of a.

clutch member 107 slidable on a'ndkeyed to the sleeve 108` extendingfrom the hub 109 of`a Worm gear 110 rotatableon lixed stud 111 anddriven by Worm 85.` The clutch member 107 has teeth 112 to engage lugs 113011 a multiplier chaincyiinder 114 freely rotatable on sleeve 108 and heldin position by hub 109 and collar 115 secured to the sleeve 108;` The raising ofleverf105v byfa ball on the control chain connects the driving Worm gear110 to the multipliercylinder- 114 to cause rotation vof the .latter.` A spring 1162 interposed between fixed lug 117 ofthe dobby frame and klinger 118 of lever'100 tends to move the clutch member 107 away from the cylinder 114. i s y It willy be apparent that the control mechanism just described determines the position ofthe rock-ing frame 29 andy which of the cylinders 31 or 32 shall be active; isable to n 'disconnect the tvvo cylinders and 32 from their driving gearing so that they may re# main at restforthepurpose of Weaving plain; and starts and stops the multiplier mechanism about to bedescri'bed.

Multiplier mechanism. n

I liavelalready described how' the control chain starts and stops' the multiplier'chain, and I Will novv describe. how the multiplier determines when the control chain shall be active and when ity shall be at rest. The rmiltipliei` Cylinder 114 ycarries a single space f lll counter chain 119 having va number of high link 12() and a low link 121. A lever 122 lies over the chain and is secured to a short shaft 123 which is free to rock in a bearing 124 formed as part of the dobby frame. The previously described arm 93 is secured to the shaft 123 and controls the collar or clutch member 90. A. spring 125 interposed be @pe/ration.

Then the loom is running the upright shaft 41 and the worm gear 85 will receive a complete revolution every second pick of the loom and the dwell and actuating parts of the worm are such that gear 86 will receive an advance movement on even picks of the loom and gear 110 will receive an advance movement on the intervening' odd picks. The result of this action is thagt either' one or the other of .the control or multiplier chains will be moved inasmuch as the control chain is so built that one or the other of the clutch members or 107 will be operatively engaged with the cylinder associated therewith. So long as there are so-called sinkers under the lever 94 spring 102 will hold the collar 99 and worm 40 in driving Contact so that one or another of the cylinders 31 or 32 will be driven. This condition corresponds to the figured part of the repeat of the pattern which is be ing woven by one or another of the dobby chains mounted on the cylinder' 31 or 32. lfilhen the figur-ed part of the repeat is finished and it is desired to weave plain a ball on the control chain will come up under lever 94 and by mechanism previously described and shown in Fig. 8 th-e worm 40 will be disconnected from the shaft 41 and the gear 42 will come to rest. This will happen no matter which of the two cylinders 81 or 32 is active and at such a time as a bar 33 pegged .for plain weaving is under the levers 25 and 26. The number of picks during which the plain weave is being woven can be determined either by the control chain or the multiplier, or both. For instance, if ten picks of plainare desired and this does not correspond to the number of links in .chain 119, then there will. be live bars on the control chain with balls under lever 94 and the multiplier cylinder 114 will be stopped by lever 105 having a sinker thereunder when low link 121 Leeseo'r is under lever 122. Under these conditions gear 86 will drive the control chain for ten picks during` which the loom will weave plain. Thereafter a sinker or low ball will appear under lever 94 and spring 102 will act to lestablish driving connection between collar 99 and worm 40 to resume the weaving of the figured part of the repeat. If,

on the other hand, the number of picks of y plain which are to be woven correspond to theV number of picks controlled by the multiplier chain, then a ball will be under lever so that the cylinder 114 will rotate, the high links of the multiplier chain acting as previous.y described to hold the control chain at rest. After the multiplier chain ha-s completed its cycle, control may be resumed by the control chain and the figur-ed part of the weave incorporated into the fabric.

It will be seen that when the weave passes from the plain to the figured part thereof it is possible to have this change accompanied by a shifting of the position of the frame 29 so that the other of rthe cylinders 31 or 32 can continue control after the plain weaving has been finished. From the mechanism described it is possible to weave plain from either cylinder irrespective of which cylinder has been producing a figured weave and that the plain weave can be followed by a weave controlled from either of the cylinders independent of which cylinder was weaving plain.

The form of control mechanism and multiplier shown herein. so far as they are interrelated and provided with inter-controlling levers, may be of the usual construction and I do not claim these parts as such. It is old, especially in fancy terry towel looms, to have the boi; or control chain and multiplier' chain substantially as shown herein and it is also old as set forth in my aforesaid patent to have the control chain determine the position of the rocking frame 29, but so far as I am aware it is Vnew to have the drive for the cylinders 81 and 32 under control of the control chain and it is furthermore new, I believe, to have these two cylinders under control of the multiplier chain so that the saine multiplying unit can be made to apply to eitherof the cylinders depending upon which one i s weaving plain. These features of the invention are rendered possible by thc substitution of the double index chain and `lingers for the corresponding single iudex elements heretofore used and shown in my aforesaid patent.

From the foregoing it will be seen that I have provideda double index double cylinder dobby wherein the length of the chain required on the dobby cylinders 31 and 32 are one-half the length of the chain Vheretofore required and necessitated by the dobby set forth in my aforesaid patent. It will further be seen thatbecause of the fact that the dobby cylinders andthe control chain aredriven in the saine time, that is, receive an advance movement every second pick, it is not .possible for the pattern to vget outof time and the proper set of pegs Siler 3 5 will resume control when `the frame 29 is rocked. In my previous patent the cylinders correspending to cylinders 3l and 32 receive a movement every pick of the loom anfdfthere was therefore not the possibility of a ,misi pick which exists when `the indications for two successive picks `are given by a single bar of the chain. It will furthermore :be seen that by reason ofthe control exercised over the cylinders 3l and 32 by the control chain and also the multiplier chain itis possible to arrest both of said cylinders so that either one may bepegged to weave plain. Also, the number' of picks which are to be woven plain by either of said cylinders can .be determined either from the control chain the loom, a separate chain of pattern bars mounted on each cylinder, each pattern bar having a double row of indicatorpins, ysets of upper and lower dobby hooks, a rocking lever, means to rock said levers alternately in opposite directions on. alternate picks of the loom, knife bars for said dobby Ihooks actuated by said levers, a separate indicator lever for each upper and each lower hiook, a lifter rod for each upper hook engaging alternate indicator levers, each remaining indicator lever directly engaging a lower' hook, a pair of cylinder fingers for .cachindicator leverfeach pairbeingpositioned yfor engagement by one only of said pins: on each pattern chain bar of each cylinder, patterncontrolled means effective to rendersaid pattern cylindersalternately active `and to simultaneously move the corresponding cylinder lingers to operativeposition, means to advance said pattern-controlled vmeans in' fixed relation to the operation kof` ,sa1dlp at terncylinder feed and tothe (movements, of

said rocking levers yand knife bars, saidknife bars alternately engaging l 4and moving L said upper and lower dobby liooksafter each ladvance ,movement ofone of said cylinders, and in timed relation therewith, whereby the loom harnesses are shifted inpredetermined combinations. y

2. yIn aloom'dobby having asetof1 dobby lingers to, control the harnesslevers of the with respect to the lingers, control means to render said cylinders alternately operative with r respect to the lingers, a control chain for said means, a doubleindex pattern chain on each pattern cylinder, and ineansto give the control. mechanisn'i and the cylinders opi erative movements at equal intervals, said last named means giving a motion to the control mechanism and to thefcylinder operatively related to the lingers at intervals of two picks ofithe loom.

4. In a loom dobby having a set of dobby lingers to control the harness levers of the loom andtwo pattern chain cylinders movable one at a time into controlling position with respect to the fingers, a control chain given an ,operative movement every second pick of the loom, means actuated by the control chain to render the cylinders alter'- natelyv operative with respect to the dobby fingers, a double index chain on each cylin- -der, and means to move the Acylinder operatively disposed with respect to the dobby lingers every secondpick of the loom.

5. I n a loom dobby havinga set of dobby fingersto control the harness levers of the loom and two pattern chain cylinders mov` able one at a time into centrolling position' withrespect'to the fingers, a control chain given an operative movementevery second pick of theloom, means actuated by the control chain torender the cylinders alternately operative -with respect tothe dobby fingers, a double indexchain on each cylinder, and means toinove the cylinder operatively disposed-with respect to thedobby lingers every second pick ofithe loom, the control chain adapted4 to lreceive amovement on alternate picks of tli-e loom and the cylinder' operativelydisposed with respect to the fingers adapted to receiveainovement on the intermediate picks of the loom'. y

6. In ac loom dobby havinga set ofdobby fingers Lto Control the harness levers of ther loom and two pattern chain cylinders movable one 4ata timefinto controlling position with respect to, the' fingers, `a `rocking frame on which the .cylinders'areimounted, a control chain, means Kactuated fby' vthe control chain to alt-er the position ofthe rocking frame to move the cylinders oney at a time into operative position .with respect tothe fingers, a double index chain on each cylinder, and means to give the control chain and the cylinder operatively disposed with respect to the fingers operative movements at intervals of two picks of the loom.

7. In a loom dobby having a set of dobby fingers to control the harness levers of the loom and two pattern chain cylinders movable one at a time into controlling position with respect to the ngers, a. control chain to receive a step by step movement, means interposed between the control chain and the cylinders to move one of said cylinders v at a time into operative position with respect to the dobby fingers, a pattern chain on each cylinder to control a plurality of picks of the loom while the operative cylinder is at rest, means to `give the cylinder operatively related to the fingersa step by step movement, and means to hold the control chain` and the cylinder operatively disposed with respect to the fingers at rest between successive movements thereof for a number of picks equal to the number of picks which are controled by the pattern cylinder operatively disposed with respect to the fingers when said cylinder is at rest` 8. In a loom dobby having a set of dobby fingers to control the harness levers of the loom and two pattern chain cylinders movable one at a time into controlling position with respect to the fingers, a control chain, means interposed between the control chain and the cylinders to render one of said cylinders operative at a time with respect to the dobby fingers, pattern chains on each cylinder, each chain being formed of bars and each bar being able to control a plurality of picks of the loom, and means to give the operative cylinder and the control chain a movement at intervals corresponding in number of picks to the number' of picks controlled by one bar of the pattern chain.

9. In a loom dobby having a set of dobby fingers to control the harness levers of the loom, a pair of pattern cylinders movable alternately into controlling` position with respect to the dobby fingers, a pattern chain on each cylinder having bars each effective to control a plurality of picks of the loom, and means to drive the cylinder operatively disposed with respect to the fingers at an interval of picks corresponding to the number of picks controlled by any one bar voit the chain.

10. In a loom dobby having a set of dobby fingers to control the harness levers of the `loom and two pattern chain cylinders movable one at a time into controlling position with respect to the fingers, a control cham,

` means interposed between the control chain and the cylindersto render one of said cylinders at a time operative with respect to the fingers, a pattern chain mounted onrthe cylinder operatively disposed with respect to the fingers and having bars each effective to control a plurality of picks, and a multiplier mechanism for the control chain to arrest the movement of the latter when either cylinder 1s operatively related to the fingers, whereby either cylinder is effective to produce a weave controlled by one bar of the chain on the cylinder operatively related to the fingers for a number of picks greater than the number of picks controlled by one bar of the chain.

ll. In a loom dobby having a set of dobby fingers to control the harness levers of the loom and two pattern chain cylinders movable one at a time into controlling position with respect to the fingers, a control chain, means interposed between the control chain and the cylinders to render one of said cylinders at a time operative with respect to the fingers, a pattern chain mounted on theV cylinder operatively disposed with respect to the fingers and having bars each effective to control a plurality of picks, and a. multiplier mechanism for the control chain to arrest the movement of the latter when either cylinder is operatively related to the fingers, whereby either cylinder is effective to produce a weave controlled by one bar of the chain on the cylinder operatively related to the fingers for a number of picks greater than the number of Vpicks controlled by one bar of the chain, said control chain effectiveto shift control of the dobby fin- A gers from one cylinder to the other, wherebythe pattern chain of either cylinder may be'effective when at rest to control the weave of the loom.

12. In a loom dobby having a set of dobby fingers to control the harness levers ot the loom and two pattern chain cylinders movable one at a time into controlling position with respect to the fingers, a control mechanism, a multiplier mechanism, means actuated by the control mechanism to render` either of said cylinders operatively disposed with respect to the dobby fingers at a time, and a pattern chain on each cylinder formed of bars each of which is effective to control a plurality of picks of the loom, the chain for at least one of the cylinders having at least one bar to produce plain weaving, and connections between the multiplier and control mechanisms whereby the latter is held at rest for a plurality of picks greater than the number of picks controlled by one bar of chain when the aforesaid bar for controlling plain weaving is operatively placed with 1espect to thev dobbyfingers.

13. In a loom dobby having a setof dobby nisni and the pattern cylinders and actuable by the control chainy to render either of the pattern cylinders operative with respect to the dobby fingers at a time, means to drive the pattern cylinder operatively disposed with respect tothe lingers, means to arrest movement of the last named pattern cylinder actuated by the control mechanism while the control chain moves, said control chain heilig capable of exchanging the control oi the dobby fingers from one pattern cylinder to the other While said pattern cylinders are at rest.

14e. In a loom dobby having a set of dobby fingers to control the harness levers of the loom and two pattern chain cylinders movable one at a time into controlling position with respect'to the lingers, control mechanism, means interposed between the control mechanism and the cylinders to determine which cylinder shall be operatively disposed With respect to the dobby finger, means to drive the cylinder operatively disposed With respect to the lingers, means to arrest such movement of said last named cylinder, and a pattern chain 'for the cylinder controlling the dobby fingers effective to control a plurality of picks when said cylinder is at rest.

l5. In a loom dobby having a set of dobby fingers to control the harness levers of the loom and tvvo pattern chaincylinders movable one at a time into controlling position With respect to the lingers, a. control mechanism, a multiplier mechanism, means interposed betiveen the control mechanism and the pattern cylinders to render one or the other of the latter operative With respect to the dobby fingers, a pattern chain on each pattern cylinder formed of bars each of which controls a plurality of picks of the loom, certain bars of' each chain being pegged to Weave plain andthe remaining bars ot one chain effective to produce another type of vveaveand the remaining bars of the other chain effective to produce stillk another type of Weave, and means actuated other whereby any of the types of weavesr` Wovenby any part oi' one chain can be fols, loWed by any other type of Weave Woven by either chain.

16. In a loom dobby having a set of dobby fingers to control the harness levers of the y loom and two pattern chain cylinders movable one at a timefintoy controlling position with respect to thefingers, ascontrol mechanism, means interposed between the control mechanism and the cylindersto render one or the other of the cylinders operativesvvith respect to the dobby fingers, means to drive the pattern cylinder operatively positioned with respect to the fingers, devices actuated by the control mechanism to arrest the drive of the pattern cylinder operatively positioned with respect to the fingers, and a pattern chain on the cylinder controlling the fingers eiifective to control a plurality of picks of the loom for veach movement of the pattern cylinder therefor.

17. In a dobby havinga of dobby fingers to control the harness-levers, a pair yof pattern cylinders movable one at a time into operative position with respect to the lingers, control mechanism operatively connected to the pattern cylinders to determine wvhich of' thelatter shall be operatively disposed with respect to the lingers, means to drive the pattern cylinder operatively disposed With respect to the dobby fingers, and

additional means actuated bythe control mechanism to stop the drive of the pattern cylinder operatively disposed with respect.

to the dobby lingers. i In testimony whereof fixed my signature.

ALBERT A. GORDON.

Iy have hereunto af- 

